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C$ 255+ Cheap flights to St. Charles

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
— STL
19 May — 26 May1
1 adult
1 adult, Economy, 0 bags

Flights to St. Charles in 2026

Enter your travel dates to find the best prices.

Cheapest flights to St. Charles
Explore the most affordable flight options available to St. Charles. Find the lowest fares based on data from user searches, with prices last updated on 19 April 2026.

Wed 27/511:39 a.m.
YYZ
-
STL
1 stop9h 51m
American Airlines
Wed 10/66:00 a.m.
STL
-
YYZ
1 stop7h 28m
American Airlines
Deal found 17/4C$ 411
Wed 6/53:13 p.m.
YYZ
-
STL
1 stop8h 04m
American Airlines
Tue 12/52:33 p.m.
STL
-
YYZ
1 stop7h 56m
American Airlines
Deal found 15/4C$ 428
Sat 23/57:45 a.m.
YYZ
-
STL
1 stop17h 12m
Multiple Airlines
Sat 30/55:27 p.m.
STL
-
YYZ
2 stops20h 33m
Multiple Airlines
Deal found 15/4C$ 537
Sat 23/53:10 p.m.
YYZ
-
STL
1 stop9h 44m
American Airlines
Sat 30/56:00 a.m.
STL
-
YYZ
1 stop10h 44m
American Airlines
Deal found 15/4C$ 541
Sun 17/56:15 a.m.
YYZ
-
STL
1 stop8h 48m
American Airlines
Tue 19/55:51 a.m.
STL
-
YYZ
1 stop7h 42m
American Airlines
Deal found 16/4C$ 542
Wed 27/511:00 a.m.
YYZ
-
STL
Nonstop2h 06m
Air Canada
Wed 10/68:40 a.m.
STL
-
YYZ
Nonstop1h 58m
Air Canada
Deal found 19/4C$ 553
Thu 11/67:45 a.m.
YYZ
-
STL
1 stop17h 24m
Multiple Airlines
Tue 16/66:31 p.m.
STL
-
YYZ
2 stops24h 34m
Multiple Airlines
Deal found 18/4C$ 560
Tue 26/59:50 a.m.
YYZ
-
STL
1 stop15h 07m
Multiple Airlines
Thu 28/59:21 p.m.
STL
-
YYZ
2 stops25h 14m
Multiple Airlines
Deal found 15/4C$ 561

Find flight deals to St. Charles

Find the latest flights to St. Charles in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 629,999 searches and data was last updated on 19 April 2026.

Round-trip from

C$ 411

One-way from

C$ 230

Popular in

March

Cheapest in

June

Average price

C$ 856
American Airlines
  • American Airlines
  • 27/5-10/6
  • 2 total stops
  • 17h 19m total
  • Toronto to St. Louis
Search Deals
29/5
  • 29/5
  • 1 total stop
  • 17h 12m total
  • Toronto to St. Charles
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (C$ 210 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease (C$ 53 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Locate flights to St. Charles that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 629,999 searches and data was last updated on 19 April 2026.
Use the filters below to find and compare flights to St. Charles that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 27/5

4:00 p.m.-8:25 p.m.

1 stop5h 25m

Lambert-St Louis

Wed 10/6

2:15 p.m.-5:13 p.m.

Nonstop1h 58m

C$ 565

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 17/5

2:20 p.m.-5:16 p.m.

1 stop3h 56m

Lambert-St Louis

Sun 24/5

6:00 a.m.-1:40 p.m.

1 stop6h 40m

C$ 583

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 2/6

7:00 a.m.-12:11 p.m.

1 stop6h 11m

Lambert-St Louis

Sat 6/6

1:13 p.m.-8:44 p.m.

1 stop6h 31m

C$ 583

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 4/6

6:10 a.m.-9:29 a.m.

1 stop4h 19m

Lambert-St Louis

Mon 8/6

3:57 p.m.-9:59 p.m.

1 stop5h 02m

C$ 583

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 11/6

5:15 p.m.-9:16 p.m.

1 stop5h 01m

Lambert-St Louis

Tue 16/6

9:23 a.m.-3:46 p.m.

1 stop5h 23m

C$ 583

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 29/5

12:29 p.m.-4:46 p.m.

1 stop5h 17m

Lambert-St Louis

Sun 31/5

6:21 a.m.-11:36 a.m.

1 stop4h 15m

C$ 623
Quickest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Tue 2/6

7:00 p.m.-8:09 p.m.

Nonstop2h 09m

Lambert-St Louis

Wed 3/6

2:15 p.m.-5:13 p.m.

Nonstop1h 58m

C$ 635

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Fri 29/5

8:10 a.m.-8:55 a.m.

2 stops25h 45m

Lambert-St Louis

Sun 31/5

6:21 a.m.-11:36 a.m.

1 stop4h 15m

C$ 645

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Thu 14/5

9:49 a.m.-9:09 p.m.

1 stop12h 20m

Lambert-St Louis

Thu 21/5

1:27 p.m.-11:58 p.m.

1 stop9h 31m

C$ 671
Cheapest one-way

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Sun 14/6

4:45 p.m.-6:36 p.m.

2 stops26h 51m

C$ 270

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/4

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Best time to book a flight to St. Charles

Have a flexible travel schedule? Discover the best time to fly to St. Charles with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight to St. Charles

How long is the flight to St. Charles?

On average, a flight from Toronto to St. Charles takes 2 hours 6 minutes. Flights to St. Charles from other popular cities in Canada will vary in length. Below are a few examples of popular routes and their flight times.

Weekly flight availability to St. Charles

The most flights from Toronto to St. Charles are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

What are the most popular airlines that fly to St. Charles?

The most popular airlines flying from Toronto to St. Charles are Air Canada, United Airlines and American Airlines.

Air Canada
Air Canada
From C$ 211
United Airlines
United Airlines
From C$ 330
WestJet
WestJet
From C$ 552
American Airlines
American Airlines
From C$ 272

What are the cheapest airlines that fly to St. Charles?

The cheapest airlines flying from Toronto to St. Charles are United Airlines, American Airlines and Air Canada.

Rainfall in St. Charles by month

Plan your trip to St. Charles by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Charles ranges from 56.0 - 119.0 mm per month. May is typically the wettest month, when rainfall can reach 119.0 mm. February is typically the driest time to visit St. Charles when rainfall is around 56.0 mm.

Temperature in St. Charles by month

Plan your trip to St. Charles by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Charles, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 0.0 C).

Reviews of airlines servicing St. Charles

Get insights into the airlines that provide service to St. Charles. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Charles. Reviews last updated 19 April 2026.
Read through reviews of airlines serving the United States, such as United Airlines and Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,605 reviews
Check prices

Boarding

7.7

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,605 reviews
United Airlines
7.4
Good
9,605 reviews
Check prices

Boarding

7.7

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
Air Canada
7.1
Good
10,939 reviews
United Airlines
7.4
Good
9,605 reviews
Check prices

Boarding

7.7

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

FAQs about flying to St. Charles

  • Can I find cheaper flights to St. Charles if I am willing to have layovers?

    Yes, flights with layovers are often cheaper than direct flights. Keep an eye out for flight deals to St. Charles on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to St. Charles?

    Based on reviews from Cheapflights users, Air Canada is rated the highest out of the airlines that fly to St. Charles.

  • How much is a round-trip flight to St. Charles?

    A round-trip flight to St. Charles will typically cost around C$ 494, however they can be found for as little as C$ 280.

  • Where does the fastest flight to St. Charles depart from?

    For those looking to save time traveling to St. Charles, Toronto offers the quickest one-way flight (2 hours 6 minutes).

  • Does Lambert-St Louis have rental cars?

    Yes. Those touching down at Lambert-St Louis can take advantage of the rental car services offered upon their arrival.

  • Are there hotels close to Lambert-St Louis?

    Yes. Lambert-St Louis has hotels nearby for those requiring accommodations. Hampton Inn St. Louis-Airport is the closest property to Lambert-St Louis (0.0 km away from Lambert-St Louis).

See more FAQs

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Yes, Cheapflights offers price alerts on St. Charles flights so you can book your flight when prices are ideal. Enable price alerts by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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